71.55.-i Impurity and defect levels
- 71.55.Ak Metals, semimetals, and alloys
- 71.55.Cn Elemental semiconductors
- 71.55.Eq III-V semiconductors
- 71.55.Gs II-VI semiconductors
- 71.55.Ht Other nonmetals
- 71.55.Jv Disordered structures; amorphous and glassy solids (1)